Prison Realm 
Enchantment
When this enchantment enters, exile target creature or planeswalker an opponent controls until this enchantment leaves the battlefield. When this enchantment enters, scry 1.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL